solid pinion spacer for 80 rear diff

[diby_2000]

if someone is able to show me conclusively how a solid spacer in anyh way enhances the actual strength of a diff, I'll happily recant. I might even go make myself a set of collapsible spacers. You'll have to ue lots of diagrams and small words - I'm obviously not very bright

Still no diagrams I don't think Dumbdance will be convinced yet

no, I'm not   I do agree that as Wally said, the collapsible spacer makes the setup easier and faster, and that toyota probably went to the collapsible spacer to reduce manufacturing costs, but that's not necessarily evidence to suggest that either way is any stronger.

I have been working on my own theory that perhaps the torsional load on the pinion shaft in extreme loadings - could be in the region of 5kNm - induces sufficient torsional strain in the pinion shaft, with a corresponding reduction in length, which causes the bearing cones to move together towards each other - but without seeing any test data it's a pretty wild imagining.

I dont know the figures but hulsty's pics show alot of torsional load on the pinon shaft, but as dumbdunce said this will force the bearings closer together. ie more preload not less. Could it be this increased preload is killing the bearings prematurly therefor letting the pinion float? So stoping the pinion shaft from collapsing or shortening with a solid spacer make that much difference?

[Hales231271]

I doubt you could by a solid "spacer" that will work out of the box.

Sorry to say but solid spacers have to made to suit.

Could take you hours to get right.

If time is money then hello colapsable!

Cheers
Dazza

[DIRTY ROCK STAR]

for those who have had them fail, was it front or rear diff issues?
i got a solid pinion spacer for my front 80 diff. as i had read that this can be an issue.
but i wasnt aware of it being an issue in the rear?

[hulsty]

The diff i've got was I think from the rear of a 45, though I doubt the fact it had a solid spacer caused the failure, it probably just strengthened up one area that led to another failing.

[NZBJ71]

I have two pinions that look identical to that, both caused by axle wrap, installed tramp bar and haven't snapped on since (touch wood). this is in a 304 holden powered fj40 with soft springs

unfortunately spacers, solid or collapsible, wont fix that